d36f34aadf
This patch allows the consumer to set the page size of "pages" mapped by the pool FMRs, which is a feature already existing in the base verbs API. On the cosmetic side it changes ib_fmr_attr.page_size field to be named page_shift. Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2004 Topspin Corporation. All rights reserved.
|
|
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
* $Id: ib_fmr_pool.h 2730 2005-06-28 16:43:03Z sean.hefty $
|
|
*/
|
|
|
|
#if !defined(IB_FMR_POOL_H)
|
|
#define IB_FMR_POOL_H
|
|
|
|
#include <rdma/ib_verbs.h>
|
|
|
|
struct ib_fmr_pool;
|
|
|
|
/**
|
|
* struct ib_fmr_pool_param - Parameters for creating FMR pool
|
|
* @max_pages_per_fmr:Maximum number of pages per map request.
|
|
* @page_shift: Log2 of sizeof "pages" mapped by this fmr
|
|
* @access:Access flags for FMRs in pool.
|
|
* @pool_size:Number of FMRs to allocate for pool.
|
|
* @dirty_watermark:Flush is triggered when @dirty_watermark dirty
|
|
* FMRs are present.
|
|
* @flush_function:Callback called when unmapped FMRs are flushed and
|
|
* more FMRs are possibly available for mapping
|
|
* @flush_arg:Context passed to user's flush function.
|
|
* @cache:If set, FMRs may be reused after unmapping for identical map
|
|
* requests.
|
|
*/
|
|
struct ib_fmr_pool_param {
|
|
int max_pages_per_fmr;
|
|
int page_shift;
|
|
enum ib_access_flags access;
|
|
int pool_size;
|
|
int dirty_watermark;
|
|
void (*flush_function)(struct ib_fmr_pool *pool,
|
|
void * arg);
|
|
void *flush_arg;
|
|
unsigned cache:1;
|
|
};
|
|
|
|
struct ib_pool_fmr {
|
|
struct ib_fmr *fmr;
|
|
struct ib_fmr_pool *pool;
|
|
struct list_head list;
|
|
struct hlist_node cache_node;
|
|
int ref_count;
|
|
int remap_count;
|
|
u64 io_virtual_address;
|
|
int page_list_len;
|
|
u64 page_list[0];
|
|
};
|
|
|
|
struct ib_fmr_pool *ib_create_fmr_pool(struct ib_pd *pd,
|
|
struct ib_fmr_pool_param *params);
|
|
|
|
void ib_destroy_fmr_pool(struct ib_fmr_pool *pool);
|
|
|
|
int ib_flush_fmr_pool(struct ib_fmr_pool *pool);
|
|
|
|
struct ib_pool_fmr *ib_fmr_pool_map_phys(struct ib_fmr_pool *pool_handle,
|
|
u64 *page_list,
|
|
int list_len,
|
|
u64 *io_virtual_address);
|
|
|
|
int ib_fmr_pool_unmap(struct ib_pool_fmr *fmr);
|
|
|
|
#endif /* IB_FMR_POOL_H */
|